Le 08/01/2017 à 18:35, Paul A. Rubin a écrit :
I just encountered something goofy, and I'm not sure if it's a LyX bug
or something odd about what's installed on my system. When I try to
compile the attached document (LyX 2.2.2, Linux Mint 18.1, TeXLive) I'm
told that \implies is an undefined control sequence. Looking at the
source window, LyX is not loading any math-related packages. If I go
into document settings and change amsmath from "load automatically" to
"load always", things work.

To be honest, I'm not sure what LaTeX packages provide \implies. If in
fact it's not in base LaTeX, shouldn't LyX recognize that it requires
amsmath?

I don't recall encountering this before, so I'm guessing that I'm
missing a TeXLive package, but I have no idea which.

Paul


This is fixed for 2.2.3, see http://www.lyx.org/trac/ticket/10467

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